SCREEN BLANK PHONE IS ON

i had the same problem when i turn my phone on the buttons lights come on but te screen stays black and the phone doesnt turn on. the lights stay on

this sound me lcd problem try to show some official repairer.

hi zizuclassic and welcome to fixya,

have you at any time uses the touchpad? or not at all? ofcourse it should be working, you can bring it to the technician of the store where you brought it to fix the touchpad, it is better to see the unit athand to check what the cause.
thanks and have a nice day.

Your tv screen has problems with the video mode
that has setted up on your ps3, hold the power button till hear two beeps, this will reset the video mode of the ps3, and leavse you at a screen to set up the video mode of the ps3.

Succes.

To easiest way to fix this is to go back to the company you brought the phone off as it is a problem within the phone hope this helps...

Do you still have warranty and the receipt? if so take it back and they should either replace it or fix it for FREE 

Take it to the repair shop. My son's KF510 did the same. I await the results of the autopsy!
It started to play up almost straight away when he bought it a month ago. Last night it failed to go past KF510 logo then goes to a low level purple screen. Removing the battery seemed to fix it prior but not now!

its a inverter circuit fault.

pull the battery from it for a little while , if that don't do it its probably a display chip inside and it can't be replaced , they have been having problems with the screens on these phones , does the phone still work for recieving and sending calls? its not likely but not impossible the screen went

I was having a similar problem, Except that my Touchpad WORKED, You just coudln't see it working. It made noises though.

Anyways, now I have to (instead of opening the screen to view it like usual) hit the unlock button (third down on the left side) and the screen appears.

We aren't having the same problem, but it's similar. Maybe it'll work?